Walmart has announced free two-day shipping, which has been a staple of Amazon Prime's service and one of the reasons the online giant has grown. Walmart's decision to also offer two-day free shipping varies in one enormous respect from Amazon, though: Walmart's policy is free. Amazon charges customers $99 per year.

Walmart will end its ShippingPass plan, which required payment from customers. Anyone who signed up for that will receive a refund.

As part of Walmart's new deal, anyone who spends at least $35 will qualify for free shipping, a drop from the $50 the chain had previously required. As many as two million items will be available for free shipping.